Was using the furnace tonite but noticed the fan kept running but the air from the vents were cool. Swapped tanks but didnt make a difference. Got propane at the cook stove. What should i look for?...
Have you checked for restrictions to flow on the orifice to the furnace pilot and burner? I have not had this problem on my furnace, but have had it on other gas systems such as my RV oven and home gas light. You can get wire orifice cleaning kits at the hardware store with the plumbing supplies.